Motor cooling device for compressor and compressor

Abstract

The invention relates to a motor cooling device for a compressor and the compressor. In particular, the compressor comprises a compression mechanism driven by a drive shaft, a main bearing seat (20; 20 '; 20 '') and having a motor winding (70; 70 '; 70 ''). The motor cooling device comprises an oil cooling component (30; 30 ') arranged below the main bearing seat and used for receiving and distributing oil from the main bearing seat. 30 '; 30 ''), which is provided with holes (33d; 33d '; 33d '') and comprising a receiving and distributing portion (33; and a receiving and distributing portion (33, 33 ', 33' ') configured to receive and distribute oil such that the oil received by the receiving and distributing portion can flow laterally in the receiving and distributing portion and drop onto the motor winding below through the hole (33d, 33d', 33d ''). According to the motor cooling device of the present invention, uniform cooling of the motor winding is achieved.

Description

Technical Field

[0001] The present invention relates to the field of compressors, and in particular to a motor cooling device for a compressor (especially a scroll compressor). Background Art

[0002] This section provides background information related to the present disclosure which does not necessarily constitute prior art.

[0003] In actual operation, the motor of the compressor has the risk of high temperature failure under certain working conditions, which in turn leads to abnormal operation of the compressor due to voltage fluctuations. In order to reduce or even eliminate this failure form, it is necessary to provide a motor cooling device in the compressor.

[0004] At present, there are two types of motor cooling devices that cool the motor through different cooling media, namely, gas and oil. For cooling devices that use gas as the cooling medium for cooling, the following measures are usually adopted to achieve motor cooling: increase the length of the intake pipe, add an additional intake baffle, and add an additional funnel distributor. However, the above cooling measures have room for improvement in the cooling effect on the motor, especially the lower winding of the stator, and the energy efficiency of the compressor is affected because part of the working fluid is used for cooling. In cooling devices that use oil as the cooling medium for cooling, there is also room for improvement in the cooling effect due to factors such as the limitations of the cooling structure in the layout method. Summary of the invention

[0005] The object of the present invention is to solve the above-mentioned problem, namely, to achieve uniform cooling of the motor windings.

[0006] In particular, an object of the present invention is to provide a motor cooling device which reliably achieves uniform cooling of a motor winding by providing an oil cooling member capable of receiving oil and allowing the oil to flow laterally to redistribute the oil.

[0007] In addition, another object of the present invention is to provide a motor cooling device, which achieves uniform cooling of the motor winding at a lower cost without making any changes to the structure of the main bearing seat in the related technology by shortening the oil drain pipe in the related technology and adding an oil cooling component.

[0008] In addition, another object of the present invention is to provide a motor cooling device, which realizes that the oil accumulated in the main bearing seat is preferentially used to cool the motor winding by providing a first oil drain pipe installed at a lower position than the second oil drain pipe.

[0009] In addition, another object of the present invention is to provide a motor cooling device, which achieves a better cooling effect on the motor winding by combining oil cooling and air cooling.

[0010] According to a first aspect of the present invention, there is provided a motor cooling device for a compressor, the compressor including a compression mechanism driven by a drive shaft, a main bearing housing for supporting the drive shaft, and a motor having a motor winding, characterized in that the motor cooling device includes an oil cooling component disposed below the main bearing housing for receiving and distributing oil from the main bearing housing, the oil cooling component being provided with holes and including a receiving and distributing portion configured to receive and distribute oil such that the oil received by the receiving and distributing portion can flow laterally in the receiving and distributing portion and drip through the holes onto the motor winding below.

[0011] In the above-mentioned motor cooling device, the oil cooling component is substantially disc-shaped or substantially annular, and the holes are distributed at a plurality of positions in the circumferential direction and / or the radial direction of the motor cooling device, so that the oil received by the motor cooling device can flow laterally in the receiving and distributing portion and then drip evenly onto the motor winding through the holes.

[0012] In the above-mentioned motor cooling device, the receiving and distributing portion includes an oil receiving portion for receiving the oil and a bottom wall-shaped distributing portion communicating with the oil receiving portion for laterally flowing the received oil, and the holes are provided in the distributing portion.

[0013] In the above-mentioned motor cooling device, the oil receiving portion is disposed outside the distributing portion in the radial direction of the motor cooling device, and the oil receiving portion is configured as at least one lug or as a substantially annular region.

[0014] In the above-mentioned motor cooling device, the oil receiving portion is configured as a groove having an accommodation space.

[0015] In the above-mentioned motor cooling device, the motor cooling device further includes a pipeline for assembling to the main bearing housing and for discharging the oil in the main bearing housing, wherein the pipeline includes a first oil discharge pipe for discharging the oil in the main bearing housing to the receiving and distributing portion.

[0016] In the above-mentioned motor cooling device, the pipeline further includes a second oil discharge pipe for assembling to a second oil discharge pipe assembly hole of the main bearing housing, the position of the second oil discharge pipe assembly hole being higher than the position of a first oil discharge pipe assembly hole of the main bearing housing for assembling the first oil discharge pipe, wherein the motor cooling device is configured such that the oil discharged from the second oil discharge pipe does not drip onto the receiving and distributing portion.

[0017] In the above-described motor cooling device, the motor cooling device further includes an air-cooling component that cools the motor windings by means of the gas inhaled into the compressor, and the air-cooling component includes: an inlet for introducing an intake air flow into the air-cooling component; a first air flow passage communicating with the inlet; and a second air flow passage communicating with the first air flow passage and for discharging the intake air flow to the motor windings.

[0018] In the above-described motor cooling device, the second air flow passage is disposed inside the oil-cooling component in the radial direction of the motor cooling device.

[0019] In the above-described motor cooling device, the second air flow passage includes a plurality of second air flow passages that are circumferentially distributed along the motor cooling device to uniformly discharge the intake air flow circumferentially along the motor cooling device to the motor windings.

[0020] In the above-described motor cooling device, the plurality of second air flow passages are in a grid shape.

[0021] In the above-described motor cooling device, the second air flow passage is in a shape that tapers downward in the axial direction of the motor cooling device.

[0022] In the above-described motor cooling device, the oil-cooling component and the air-cooling component of the motor cooling device are integrally formed.

[0023] In the above-described motor cooling device, the motor cooling device is provided with a partition wall that spaces apart the oil passage of the oil-cooling component and the air passage of the air-cooling component from each other.

[0024] According to a second aspect of the present invention, there is also provided a compressor, which is a scroll compressor including the motor cooling device according to the above aspect.

[0025] Preferably, the above compressor is a scroll compressor, and the oil-cooling component of the motor cooling device is fixedly mounted to the main bearing seat of the scroll compressor.

[0026] According to the motor cooling device of the present invention, by configuring the oil-cooling component such that the oil-cooling component can receive oil and allow the oil to flow laterally for oil redistribution, uniform cooling of the motor windings is achieved. In addition, by providing the oil-cooling component with holes arranged substantially uniformly, the oil uniformly drips onto the motor windings below, thereby further ensuring uniform cooling of the motor windings. In addition, by combining the oil-cooling component and the air-cooling component, a better cooling effect on the motor windings is achieved with little or no adverse effect on the compressor efficiency. Description of the Drawings

[0027] The accompanying drawings illustrate some embodiments of the related art and the present invention by way of example only, but the present invention is not limited to the embodiments shown in the drawings.

[0028] Figure 1 is a cross-sectional view of a scroll compressor in the related art.

[0029] Figure 2 is an exploded perspective view showing a motor cooling device and a main bearing housing in the first embodiment.

[0030] Figure 3 is a perspective view showing the first oil drain pipe in the first embodiment.

[0031] Figure 4 is a partial view showing a compressor equipped with a motor cooling device in the first embodiment.

[0032] Figure 5 is a perspective view seen from above showing an oil pan in the first embodiment.

[0033] Figure 6 is a perspective view seen from below showing an oil pan in the first embodiment.

[0034] Figure 7 is an exploded perspective view showing a motor cooling device and a main bearing housing in the second embodiment.

[0035] Figure 8 is a perspective view showing a main bearing housing in the second embodiment.

[0036] Figure 9 is a perspective view showing the first oil drain pipe in the second embodiment.

[0037] Figure 10 is a partial view showing a compressor equipped with a motor cooling device in the second embodiment.

[0038] Figure 11 is a perspective view seen from above showing an oil pan in the second embodiment.

[0039] Figure 12 is a perspective view seen from below showing an oil pan in the second embodiment.

[0040] Figure 13 is a perspective view showing a motor cooling device in the third embodiment.

[0041] Figure 14 is a top view showing a motor cooling device in the third embodiment.

[0042] Figure 15 is a longitudinal sectional view showing a motor cooling device in the third embodiment.

[0043] Figure 16 is a cross-sectional view of a compressor showing the first oil discharge pipe of the third embodiment.

[0044] Figure 17 is a cross-sectional view of a compressor showing the first air flow passage of the third embodiment. Detailed Embodiments

[0045] Hereinafter, with reference to the attached Figure 1 a scroll compressor in the related art will be described, and with reference to Figures 2 to 17 a motor cooling device according to the present invention will be described.

[0046] As Figure 1 shown, in the related art, the oil flowing out from the main bearing housing 20P is guided through the drain pipe 10P to the space between the motor and the inner wall of the housing, and the oil that mainly flows back along the inner wall of the housing to the oil sump at the bottom of the compressor. In the related art, since the oil is not intended to be guided to the motor (especially the winding of the stator of the motor), a satisfactory effect of cooling the motor winding by means of the oil is not achieved.

[0047] It has been found that in a conventional scroll compressor, under HCR (high compressor ratio) operating conditions, the temperature of the motor winding is about 130 °C, while the temperature of the oil in the oil sump is about 80 °C, so that the temperature of the oil is significantly lower than the temperature of the motor winding (i.e., the winding of the stator of the motor). Based on this finding, the present invention has been developed, which realizes the cooling of the motor winding by making full use of the oil discharged from the main bearing housing.

[0048] Hereinafter, with reference to Figures 2 to 6 a motor cooling device according to the first embodiment of the present invention will be described.

[0049] As Figure 4 shown, the compressor (particularly, the low-pressure side scroll compressor) includes a main bearing housing 20 and a motor winding 70.

[0050] As Figure 2 shown, the motor cooling device includes an oil cooling member disposed below the main bearing housing 20. The oil cooling member is substantially disk-shaped and is an oil receiving tray 30 in this embodiment. The oil receiving tray 30 can receive and distribute the oil dripping from the main bearing housing 20. The oil dripping on the oil receiving tray 30 can move laterally in the oil receiving tray 30. Here, the lateral flow can be understood as flowing in a direction substantially orthogonal to the axial direction of the compressor, including radial flow and circumferential flow, so as to distribute (re-distribute) the oil. In this embodiment, the main body of the motor cooling device is substantially disk-shaped.

[0051] The oil pan 30 includes a bottom wall 35 provided with holes and a side wall 36 extending substantially vertically upward from the bottom wall. The oil pan 30 is fixed to the bottom of the main bearing housing 20 by a threaded connector 40. Specifically, a threaded connection portion 32 for the threaded connector 40 to pass through is provided on the oil pan 30, and the threaded connection portion 32 has a cylindrical shape protruding from the upper surface of the bottom wall 35 of the oil pan 30.

[0052] Optionally, the compressor further includes a pipe for discharging the oil inside the main bearing housing 20. Although the motor cooling device is schematically shown in the drawings to include this pipe, this pipe does not necessarily form part of the present invention. As Figure 3 shown, the pipe includes a first oil discharge pipe 10, and the first oil discharge pipe 10 includes a laterally extending portion 11, a vertically extending portion 12, and an outlet 13. Among them, the first oil discharge pipe 10 is assembled to the main bearing housing 20 through the laterally extending portion 11 so that the oil in the main bearing housing 20 can flow into the first oil discharge pipe 10. The vertically extending portion 12 is connected to the laterally extending portion 11 and extends substantially perpendicular to the laterally extending portion 11 so that the oil drips onto the oil pan 30 along a substantially vertical direction in the vertically extending portion 12, and the outlet 13 serves as an opening for the oil to flow out and is located above the oil pan 30. Preferably, the outlet 13 is a beveled outlet, that is, the side of the outlet 13 close to the main bearing housing 20 is closer to the oil pan 30 than the side away from the main bearing housing 30, so as to achieve good guidance for the oil flowing through the first oil discharge pipe 10. Preferably, the vertically extending portion 12 and the side wall 36 of the oil pan 30 are partially overlapped in the axial direction so that the structure of the oil-cooling component (oil pan 30) is more compact and effectively prevents the splashing of the dripping oil.

[0053] Preferably, the number of the first oil discharge pipes 10 is two, and the two first oil discharge pipes 10 are spaced apart at an angle of 180 degrees. However, the number of the first oil discharge pipes 10 can be increased or decreased according to actual needs.

[0054] Preferably, the first oil discharge pipe 10 can be a pipe formed by truncating the drain pipe in the related art. Doing so realizes the purpose of using the oil flowing out of the drain pipe in the related art to cool the motor winding without changing the structure of the main bearing housing 20.

[0055] Based on Figure 5 and Figure 6The structure of the oil pan 30 is described in detail as shown. The oil pan 30 includes a receiving and distributing portion 33 that is configured to receive the dripping oil and distribute it. Further, the receiving and distributing portion 33 includes an oil receiving portion 33c for receiving the dripping oil and a bottom wall-shaped distributing portion 33b that communicates with the oil receiving portion 33c and is configured to distribute the received oil. The distributing portion 33b is located inside the oil receiving portion 33c in the radial direction. The oil receiving portion 33c is an extending portion 33c that extends from the distributing portion 33b in a direction away from the distributing portion 33b, and the extending portion 33c is configured to form a substantially annular region along the circumferential direction of the distributing portion 33b. Although in this embodiment the extending portion 33c is exemplarily shown as a groove having an accommodation space, it can be understood that the receiving and distributing portion 33 may also be provided without an oil receiving portion (extending portion) 33c in the form of a groove, but rather the oil receiving portion (extending portion) 33c and the distributing portion 33b may be flush without a groove (as in the second embodiment to be described in detail in conjunction with Figure 11 and Figure 12 ), that is, the groove is optional for the receiving and distributing portion. When the groove is formed, the bottom wall 35 is divided into a first portion for forming the distributing portion 33b and a second portion for forming the oil receiving portion (extending portion) 33c, and the first portion and the second portion are connected by a connecting wall 37 to form a stepped shape, wherein the side wall 36 extends substantially vertically upward from the second portion. In the case where the groove is formed, the oil can be more reliably received to prevent or avoid the dripping oil from splashing out of the receiving and distributing portion 33.

[0056] Preferably, the distributing portion 33b is horizontal; or, the distributing portion 33b is slightly inclined downward in the radially inward direction to facilitate the lateral flow of the oil (i.e., the distributing portion 33b has an inclination angle that facilitates the lateral flow of the oil), thereby contributing to the uniform outflow of the oil from each hole.

[0057] A plurality of holes 33d for distributing the oil are provided in the distributing portion 33b, so that after the oil received via the oil receiving portion 33c moves laterally into the distributing portion 33b, it drops downward through the holes 33d onto the motor winding 70 located below the oil pan 30 (specifically, below the distributing portion 33b) to achieve the cooling of the motor winding 70. The holes 33d are regularly arranged in a specific manner so that the oil dripping from the distributing portion 33b uniformly falls on the motor winding 70. Although exemplarily shown that the holes 33d are only located in the distributing portion 33b, a part of the holes may also be provided in the oil receiving portion 33c, that is, the oil receiving portion is also used to distribute part of the oil dripping into the oil receiving portion, regardless of whether there is a motor winding 70 to be cooled below the oil receiving portion 33c.

[0058] In Figure 5 and Figure 6Three groups of holes arranged uniformly are schematically shown in the figure. These three groups of holes are divided into a first group of holes 33d1 at a first distance (the shortest distance) from the center of the oil pan (i.e., the center of the central hole of the oil pan), a second group of holes 33d2 at a second distance (i.e., the intermediate distance) from the center of the oil pan, and a third group of holes 33d3 at a third distance (i.e., the longest distance) from the center of the oil pan, where the distances of the respective holes in the same group from the center of the oil pan are equal. Although it is schematically shown in the figure that the number of holes in the first group 33d1 is 4 and the angle between every two adjacent holes 33d1 is 90 degrees, the number of holes in the second group 33d2 is 4 and the angle between every two adjacent holes 33d2 is 90 degrees, and the third group of holes 33d3 has only 3 holes 33d3 due to the presence of the avoidance portion ( Figure 6 the upper left part in, the avoidance portion makes the oil pan have a generally circular shape with a notch on one side, and the oil pan with the avoidance portion enables the oil pan to avoid other components in the compressor, thereby facilitating the installation of the oil pan inside the compressor while ensuring the reception and distribution of oil). The middle hole 33d3 and the holes 33d3 on both sides in the same group are also spaced apart at an angle of 90 degrees. However, it can be envisaged that more or fewer groups of holes can be provided, and the number of holes in each group can be more or less than the number shown in the figure, as long as the holes in each group are generally evenly distributed. That is to say, such a design in which the holes are evenly distributed to uniformly cool the motor winding 70 falls within the concept of the present invention, and the distribution manner of the holes is not limited to the example manner shown in the figure. For example, although not shown, it can be envisaged that only two groups of holes are provided, the first distance of the first group of holes from the center of the oil pan is different from the second distance of the second group of holes from the center of the oil pan, the first group and / or the second group of holes can further include several subgroups, each subgroup then having at least two holes, the holes in each subgroup are distributed in the same manner as any other subgroup in the same group (i.e., the first group or the second group) of holes, and the several subgroups in the same group (i.e., the first group or the second group) of holes are evenly distributed. Here, the shape of the holes is not particularly limited either.

[0059] Preferably, the holes in each group do not overlap (i.e., are staggered) in the radial direction. That is to say, in the same radial direction, there is only one hole.

[0060] As Figure 4As shown, the oil accumulated in the main bearing housing 20 drips through the first row of oil pipes 10 into the oil receiving part 33c of the oil receiving tray 30. The oil dripping onto the oil receiving part 33c can move laterally in the receiving and distributing part 33, causing the oil received in the oil receiving part 33c to flow towards the distributing part 33b. The distributing part 33b is located above the motor winding 70, so that the oil dripping from the distributing part 33b can effectively cool the motor winding 70 because its temperature is significantly lower than that of the motor winding 70.

[0061] Hereinafter, reference will be made to Figures 7 to 12 describe the motor cooling device according to the second embodiment of the present invention.

[0062] As Figure 7 shown, compared with the embodiments in the related art, in the second embodiment, the drain pipe in the related art is retained, and a first row of oil pipes 50' is added to discharge the oil for cooling the motor winding 70'. That is, in the second embodiment, the pipes for discharging the oil inside the main bearing housing include the first row of oil pipes 50' and the second row of oil pipes 10'.

[0063] As Figure 8 shown, in the wall 23' for forming the internal space for accumulating oil in the main bearing housing 20', a first row of oil pipe fitting holes 21' and a second row of oil pipe fitting holes 22' are provided. The height of the first row of oil pipe fitting holes 21' for fitting the first row of oil pipes 50' in the main bearing housing 20' is lower than the height of the second row of oil pipe fitting holes 22' for fitting the second row of oil pipes 10' in the main bearing housing 20'. That is to say, the oil accumulated in the main bearing housing 20' is preferentially discharged from the first row of oil pipes 50' for cooling the motor winding 70'. The oil discharged from the second row of oil pipes 10' is not intended to drip onto the oil-cooled component.

[0064] The first row of oil pipe fitting holes 21' is closer to the center of the central hole of the main bearing housing 20' in the radial direction than the second row of oil pipe fitting holes 22'. Subsequently, in the assembled state, the first row of oil pipes 50' is closer to the center of the central hole of the main bearing housing 20' than the second row of oil pipes 10'. Thus, the oil-cooled component (oil receiving tray) 30' is arranged inside the second row of oil pipes 10' in the radial direction. Therefore, in this embodiment, the size of the oil receiving tray 30' in the radial direction is smaller than that of the oil receiving tray 30 in the first embodiment, making the structure of the oil receiving tray 30' more compact.

[0065] As Figure 9 shown, the structure of the first row of oil pipes 50' in this embodiment is similar to the structure of the first row of oil pipes 10 described with respect to the first embodiment, except that the vertical extension part of the first row of oil pipes 50' is slightly shorter to make the structure of the oil-cooled component as compact as possible.

[0066] AsFigure 10 As shown, since in this embodiment, no additional groove is provided for accommodating the oil discharged from the main bearing housing 20', the oil pan 30' has a further reduced size in the axial direction compared to the oil pan 30 in the first embodiment, thereby making the structure of the cooling device more compact. In addition, as Figure 10 shown, the vertical extension of the first drain pipe 50' and the side wall of the oil pan 30' partially overlap in the axial direction to make the structure of the oil-cooled component (oil pan 30') more compact and effectively prevent the dripping oil from splashing. Here, "partially overlapping" can be understood as when observed in the radial direction, the vertical extension of the first drain pipe 50' and the side wall of the oil pan 30' partially overlap, or more specifically, the beveled lower end of the vertical extension of the first drain pipe 50' is at least partially located radially inside the side wall.

[0067] As Figure 11 and Figure 12 shown, the oil pan 30' includes a receiving and distributing portion 33' that is configured to receive the oil discharged from the first drain pipe 50' and uniformly distribute the oil through the holes 33d' provided in the receiving and distributing portion 33'. The arrangement of the holes 33d' in the second embodiment is similar to the arrangement of the holes 33d described in the first embodiment.

[0068] Preferably, the number of the first drain pipes 50' is two, and the two first drain pipes 50' are spaced apart by an angle of 180 degrees. However, the number of the first drain pipes 50' can be increased or decreased according to actual needs.

[0069] Preferably, the receiving and distributing portion 33' is horizontal or slightly inclined downward in the radially inward direction to facilitate the lateral flow of the oil.

[0070] The oil pan 30 includes a bottom wall 35 provided with holes and a side wall 36 extending substantially vertically upward from the bottom wall.

[0071] Hereinafter, a motor cooling device according to a third embodiment of the present invention will be described with reference to Figures 13 to 17 description.

[0072] In this embodiment, the motor cooling device includes a substantially annular oil cooling component 30” (furthermore, the main body of the motor cooling device is substantially annular), and the oil cooling component 30” includes a receiving and distributing portion 33”. Different from the separate receiving and distributing portions in the first and second embodiments, the receiving and distributing portion in the third embodiment is in the following form: the receiving and distributing portion 33” includes an oil receiving portion 33c” for receiving the dripping oil and a distributing portion 33b” communicating with the oil receiving portion 33c” for distributing the received oil. Among them, the distributing portion 33b” is a substantially annular channel and is provided with holes 33d” for allowing the oil to flow out and distributed substantially uniformly as shown in the figure, and the oil receiving portion 33c” is configured as a lug radially extending outward from the distributing portion 33b” along a direction away from the distributing portion 33b”. The oil receiving portion 33c” can be formed as a groove having a receiving space, and the oil dripping into the groove is guided to the annular distributing portion 33b”. Alternatively, the oil receiving portion 33c” can be formed as a component that does not have a receiving space but is slightly inclined downward in the inward direction to guide the oil.

[0073] Optionally, the motor cooling device further includes an air cooling component 60. The air cooling component 60 includes: a baffle 64, on which an inlet 61 for allowing the suction air flow to enter the air cooling component 60 is formed; a first air flow channel 63 fluidly communicating with the inlet; a second air flow channel 62 communicating with the first air flow channel 63 for uniformly guiding the suction air flow to the motor winding (here, the second air flow channel 62 can also be regarded as an outlet for the suction air flow to leave the air cooling component 60); and an annular air flow channel provided between the first air flow channel 63 and the second air flow channel 62 (an annular channel located above the second air flow channel and communicating with each second air flow channel). Here, admittedly, the annular channel for communicating with each second air flow channel 62 can be regarded as a separate channel or a part of each second air flow channel 62. In the following, a detailed description will be made based on the first method. The air flow entering from the inlet 61 sequentially flows through the first air flow channel 63, the annular channel, and the second air flow channel 62 and then leaves the motor cooling device and flows to the motor winding 70” provided below the second air flow channel 62. The second air flow channels 62 are uniformly distributed in the circumferential direction of the main body of the air cooling component 60. Preferably, the second air flow channel 62 is in a grid shape and includes a first guiding wall 62a and a second guiding wall 62b to guide the air flow in a desired direction. In Figure 15 it is schematically shown that the second air flow channel 62 formed by the first guiding wall 62a and the second guiding wall 62b is in a downwardly tapered shape to gather the air flow to be guided to the motor winding 70”. According to actual needs, the first guiding wall 62a and the second guiding wall 62b can also be set to be flush or the second air flow channel 62 can be expanded downward.

[0074] The gas exhausted from the second air flow channel 62 flows to the motor winding 70" to be used to cool the motor winding 70" together with the oil flowing out from the holes 33d" in the distribution portion 33b", thereby further improving the cooling effect of the motor winding 70". The holes 33d" can be distributed approximately evenly as shown in the figure, or can be evenly distributed in other ways. For example, as in the first and second embodiments, multiple groups of holes with different distances from the center of the hole of the air-cooled component are provided. In this embodiment, the gas flow path and the oil flow path are separated from each other by a partition wall 65 and are not connected to each other. The partition wall 65 is approximately annular.

[0075] Preferably, there are two oil receiving portions 33c" (lugs) and they are spaced 180 degrees apart from each other. Of course, the number of the oil receiving portions 33c" can be increased or decreased as needed. In addition, the oil receiving portion 33c" (lugs) can be provided with a protrusion 33c1", which is preferably U-shaped and optionally partially overlaps with the first oil discharge pipe 10", so as to prevent splashed oil from escaping from the oil receiving portion 33c" when the oil discharged from the first oil discharge pipe 10" drops into the oil receiving portion 33c".

[0076] like Figure 13 and Figure 14 As shown, the distribution portion 33b" is disposed outside the air-cooling component 60 in the radial direction. In addition, preferably, due to the positions of the first oil drain pipe 10" and the air intake port, the baffle 64 is spaced apart from the oil receiving portion 33c" in the circumferential direction accordingly.

[0077] Preferably, if Figure 16 As shown, the distribution portion 33 b ″ and the oil receiving portion 33 c ″ are arranged above the second air flow passage 62 in the axial direction.

[0078] Preferably, the oil cooling component and the air cooling component are integrally formed, and the oil passage of the oil cooling component and the air passage of the air cooling component are spaced apart from each other. Here, the oil passage includes a pipeline, a receiving and distributing portion and a hole, and the air passage includes an inlet, a first air flow channel and a second air flow channel.

[0079] The motor cooling device according to the present invention is particularly advantageous for use in specific scroll compressors, for example, scroll compressors using the environmentally friendly refrigerant R32 and / or combined with jet reheat. In other words, the use of the motor cooling device according to the present invention enables the scroll compressor to be easily converted from a related platform (for example, using another refrigerant) to a new platform (for example, using the environmentally friendly refrigerant R32).

[0080] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present invention is not limited to the specific embodiments described and shown in detail herein, and that various changes may be made to the exemplary embodiments by those skilled in the art without departing from the scope defined by the claims.

Claims

1. A motor cooling device for a compressor, the compressor comprising a compression mechanism driven by a drive shaft, a main bearing housing (20; 20'; 20") for supporting the drive shaft, and a motor having a motor winding (70; 70'; 70"), characterized in that, The motor cooling device includes an oil cooling component (30; 30'; 30") disposed below the main bearing housing and configured to receive and distribute oil from the main bearing housing. The oil cooling component is provided with holes (33d; 33d'; 33d") and includes a receiving and distributing portion (33; 33'; 33"), and the receiving and distributing portion is configured to receive and distribute oil such that the oil received by the receiving and distributing portion can flow laterally in the receiving and distributing portion and drip through the holes (33d; 33d'; 33d") onto the motor winding below.

2. The motor cooling device according to claim 1, wherein, The oil cooling component (30; 30'; 30") is substantially disk-shaped or substantially annular, and the holes (33d; 33d'; 33d") are distributed at a plurality of positions in the circumferential direction and / or the radial direction of the motor cooling device, such that the oil received by the motor cooling device can flow laterally in the receiving and distributing portion and then drip uniformly onto the motor winding through the holes.

3. The motor cooling device according to claim 1, wherein, The receiving and distributing portion (33; 33") includes an oil receiving portion (33c; 33c") for receiving the oil and a bottom wall-shaped distributing portion (33b; 33b") communicating with the oil receiving portion and configured to make the received oil flow laterally, and the holes are provided in the distributing portion.

4. The motor cooling device according to claim 3, wherein, The oil receiving portion (33c; 33c") is disposed outside the distributing portion (33b; 33b") in the radial direction of the motor cooling device, and the oil receiving portion is configured as at least one lug or configured as a substantially annular region.

5. The motor cooling device according to claim 3, wherein, The oil receiving portion is configured as a groove having an accommodation space.

6. The motor cooling device according to any one of claims 1 to 5, wherein, The motor cooling device further includes a pipeline configured to be assembled to the main bearing housing (20; 20'; 20") and configured to discharge the oil in the main bearing housing. Among them, the pipeline includes a first oil discharge pipe (10, 50'; 10"), and the first oil discharge pipe is configured to discharge the oil in the main bearing housing to the receiving and distributing portion.

7. The motor cooling device according to claim 6, wherein, The pipeline further includes a second oil discharge pipe (10'), and the second oil discharge pipe is configured to be assembled to a second oil discharge pipe assembly hole (22') of the main bearing housing. The position of the second oil discharge pipe assembly hole is higher than the position of a first oil discharge pipe assembly hole (21') of the main bearing housing for assembling the first oil discharge pipe (50'), and wherein the motor cooling device is configured such that the oil discharged from the second oil discharge pipe (10') does not drip onto the receiving and distributing portion.

8. The motor cooling device according to any one of claims 1 to 5 and 7, wherein, The motor cooling device further includes an air cooling component (60), and the air cooling component cools the motor winding by inhaling the gas in the compressor. Among them, the air cooling component (60) includes: an inlet (61) for introducing an intake air flow into the air cooling component; a first air flow channel (63) communicating with the inlet; and a second air flow channel (62) communicating with the first air flow channel and configured to discharge the intake air flow to the motor winding.

9. The motor cooling device according to claim 8, wherein, The second air flow channel (62) is disposed inside the oil cooling component (30") in the radial direction of the motor cooling device.

10. The motor cooling device according to claim 8, wherein, The second air flow channel includes a plurality of second air flow channels, and the plurality of second air flow channels are circumferentially distributed along the motor cooling device to uniformly discharge the suction air flow to the motor winding along the circumference of the motor cooling device.

11. The motor cooling device according to claim 10, wherein, The plurality of second air flow channels are in a grid shape.

12. The motor cooling device according to any one of claims 8 to 11, wherein, The second air flow channel (62) is in a shape that tapers downward in the axial direction of the motor cooling device.

13. The motor cooling device according to any one of claims 8 to 11, wherein, The oil cooling component and the air cooling component of the motor cooling device are integrally formed.

14. The motor cooling device according to any one of claims 8 to 11, wherein, The motor cooling device is provided with a partition wall (65) that separates the oil passage of the oil cooling component from the air passage of the air cooling component.

15. A compressor, characterized in that, The compressor includes the motor cooling device according to any one of claims 1 to 14.

16. The compressor according to claim 15, wherein, The compressor is a scroll compressor, and the oil cooling component of the motor cooling device is fixedly installed on the main bearing seat of the scroll compressor.

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